There are some minor bugs and if you could get through that - MS is okay. There are some missing features as auto-delete made links etc. which could be a pain in the ass in case that you will need to delete some links someday - you have to get that done manually.
The creator of the MS is the one man army when comes to the support and he is replying quickly enough.
If you watch some videos - and there are plenty of videos about MS you won't have problems about learning the MS. You just have to understand the main concept of how it works.
There is a built-in Harvester and you will be able to harvest sites and platforms but the Harvester it's not the best feature of MS. Of course it's good to enrich your database of platforms and sites but there is a chance that you won't need it that often, as MS provides many services which gives huge diversification: article directories, blogs, bookmarks, wikis, micro blogs and many more.
I am using the full version but as for the trial version - I was told that there are many features that are cut, so I'm not sure if you will have a grasp of it while using the trial version.
Regards